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sick version of GDB

The new version of GDB broke for me when I updated to the latest net
release. The machine in question has been running Cygwin b20.1 for quite
a while now, but it was time for an update. Moving from b20 to 1.1.2 was
fairly smooth, once the b20-specific garbage had been cleaned up.
Unfortunately, I cannot get GDB 5.0 to work.

I tried to debug cat as an example of what's wrong. 

$ gdb -nw cat # or /bin/cat or C:/bin/cat.exe ...etc
< opening messages>

(gdb) run
Starting program: /bin/cat.exe 
gdb: unknown target exception 0x000006d1 at 0x77e89b01

Program received signal ?, Unknown signal.
0x77e89b01 in ?? ()

Obviously this is not normal behavior. If I try to continue, I get the
same exception, so I haven't made any progress. Unfortunately, this makes
it impossible to debug anything. I get a similar message when run from the
tcl/tk gui and from within Emacs.

Out of frustration, I restored my old version of GDB and it seemed to
work. This is temporary work-around, but it would be really nice to use
the latest version. Still, this problem makes me nervous. Unsolved
mysteries such as this can often hint at much larger problems.

What could cause something like this? What could cause the new version to
break, while not hurting the older version?

Attached are the output of cygcheck -s -v -r, and a GDB session which
recreates the problem, with some other info that may be useful.

Has anyone out there encountered this before?

Cygnus Win95/NT Configuration Diagnostics
Current System Time: Mon Jun 19 10:58:50 2000

WinNT Ver 5.0 build 2195 

Path:	/usr/local/bin
	/cygdrive/d/Program Files/Support Tools/
	/cygdrive/d/Program Files/Resource Pro Kit/

SysDir: D:\WINNT\System32
WinDir: D:\WINNT

HOME = `/pjf'
PWD = `/pjf'

ALLUSERSPROFILE = `D:\Documents and Settings\All Users'
APPDATA = `D:\Documents and Settings\pjf.THOUGHTS\Application Data'
BISONLIB = `/usr/local/lib/'
CC = `gcc'
COMMONPROGRAMFILES = `D:\Program Files\Common Files'
COMSPEC = `D:\WINNT\system32\cmd.exe'
CVSROOT = `:ext:pjf@mailhost:/vol/cvs'
CVS_RSH = `ssh'
DISPLAY = `localhost:0.0'
EDITOR = `emacs.bat'
GS_LIB = `//d/Multimedia Files/Fonts/PostScript'
HOSTTYPE = `i586'
LESS = `-icnMd'
LOGNAME = `pjf'
MACHTYPE = `i586-pc-cygwin'
OS2LIBPATH = `D:\WINNT\system32\os2\dll;'
OS = `Windows_NT'
OSTYPE = `cygwin'
PAGER = `less'
PROCESSOR_IDENTIFIER = `x86 Family 6 Model 5 Stepping 0, GenuineIntel'
PROGRAMFILES = `D:\Program Files'
SHELL = `/bin/bash.exe'
SHLVL = `1'
TERM = `cygwin'
USERNAME = `pjf'
USERPROFILE = `D:\Documents and Settings\pjf.THOUGHTS'
VISUAL = `emacs.bat'
_ = `/bin/cygcheck'
TZ = `EST5EDT4,M4.1.0/2,M10.5.0/2'

HKEY_CURRENT_USER\Software\Cygnus Solutions
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2
  (default) = `/cygdrive'
  cygdrive flags = 0x00000020
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\mounts v2\/
  (default) = `c:\'
  flags = 0x00000000
HKEY_CURRENT_USER\Software\Cygnus Solutions\Cygwin\Program Options
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup\b15.0
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts
HKEY_CURRENT_USER\Software\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\00
  (default) = `D:'
  unix = `/'
  fbinary = 0x00000000
  fsilent = 0x00000000
HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\MenuOrder\Start Menu\Programs\Cygnus Solutions
  (default) = (unsupported type)
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\Installed Components
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\Installed Components\c:/
  (default) = `20000517'
  bash = `0002.0004.0001'
  binutils = `19990818.0001'
  bison = `0000'
  byacc = `0000'
  bzip = `0000'
  clear = `0001.0000'
  dejagnu = `0000'
  diff = `0000'
  expect = `0000'
  fileutils = `0000'
  findutils = `0000'
  flex = `0000'
  gawk = `0000'
  gcc = `0002.0095.0002.0001'
  gdb = `20000610'
  gperf = `0000'
  grep = `0000'
  groff = `0001.011a.0001'
  gzip = `0000'
  inetutils = `0001.0003.0002.0002'
  less = `0000'
  libpng = `0001.0000.0006.0001'
  login = `0001.0002'
  m = `0000'
  make = `0003.0079'
  man = `0001.005g.0002'
  patch = `0000'
  sed = `0003.0002.0001'
  shellutils = `0000'
  tar = `0000'
  tcltk = `20000610'
  termcap = `0002'
  texinfo = `0000'
  textutils = `0000'
  time = `0000'
  zlib = `0001.0001.0003.0001'
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\Cygwin\mounts v2
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\00
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\01
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\02
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\03
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\04
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\05
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\06
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\07
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\08
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\09
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\0A
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\0B
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\0C
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\0D
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\0E
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\0F
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\10
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\11
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\12
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\13
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\14
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\15
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\16
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\17
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\18
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\19
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\1A
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\1B
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\1C
HKEY_LOCAL_MACHINE\SOFTWARE\Cygnus Solutions\CYGWIN.DLL setup\b15.0\mounts\1D
  (default) = (unsupported type)
  ReferAction = (unsupported type)
  AgentAction = (unsupported type)
  FromAction = (unsupported type)

a:  fd           N/A    N/A                    
c:  hd  NTFS    4016Mb  56% CP CS UN PA FC     SystemDrive
d:  hd  NTFS    4039Mb  64% CP CS UN PA FC     OtherDrive
i:  cd  CDFS     610Mb 100%    CS              O9PRMCD02
j:  cd           N/A    N/A                    

c:    /        user    textmode

Found: c:\bin\bash.exe
Found: \bin\bash.exe
Warning: c:\bin\bash.exe hides \bin\bash.exe
Found: c:\bin\cat.exe
Found: \bin\cat.exe
Warning: c:\bin\cat.exe hides \bin\cat.exe
Found: c:\bin\cpp.exe
Found: \bin\cpp.exe
Warning: c:\bin\cpp.exe hides \bin\cpp.exe
Found: c:\bin\find.exe
Found: \bin\find.exe
Warning: c:\bin\find.exe hides \bin\find.exe
Found: c:\bin\gcc.exe
Found: \bin\gcc.exe
Warning: c:\bin\gcc.exe hides \bin\gcc.exe
Found: c:\usr\local\bin\gdb.exe
Found: c:\bin\gdb.exe
Warning: c:\usr\local\bin\gdb.exe hides c:\bin\gdb.exe
Found: \bin\gdb.exe
Warning: c:\usr\local\bin\gdb.exe hides \bin\gdb.exe
Found: c:\bin\ld.exe
Found: \bin\ld.exe
Warning: c:\bin\ld.exe hides \bin\ld.exe
Found: c:\bin\ls.exe
Found: \bin\ls.exe
Warning: c:\bin\ls.exe hides \bin\ls.exe
Found: c:\bin\make.exe
Found: \bin\make.exe
Warning: c:\bin\make.exe hides \bin\make.exe
Found: c:\bin\sh.exe
Found: \bin\sh.exe
Warning: c:\bin\sh.exe hides \bin\sh.exe

   83k 2000/06/15 c:\bin\cygitcl30.dll - os=4.0 img=1.0 sys=4.0
                  "cygitcl30.dll" v0.0 ts=2000/6/10 23:34
   35k 2000/06/15 c:\bin\cygitk30.dll - os=4.0 img=1.0 sys=4.0
                  "cygitk30.dll" v0.0 ts=2000/6/10 23:34
  402k 2000/06/15 c:\bin\cygtcl80.dll - os=4.0 img=1.0 sys=4.0
                  "cygtcl80.dll" v0.0 ts=2000/6/10 23:30
    5k 2000/06/11 c:\bin\cygtclpip80.dll - os=4.0 img=1.0 sys=4.0
   10k 2000/06/11 c:\bin\cygtclreg80.dll - os=4.0 img=1.0 sys=4.0
                  "cygtclreg80.dll" v0.0 ts=2000/6/10 23:30
  639k 2000/06/15 c:\bin\cygtk80.dll - os=4.0 img=1.0 sys=4.0
                  "cygtk80.dll" v0.0 ts=2000/6/10 23:34
  575k 2000/06/07 c:\bin\cygwin1.dll - os=4.0 img=1.0 sys=4.0
                  "cygwin1.dll" v0.0 ts=2000/6/6 22:20
   83k 2000/06/15 \bin\cygitcl30.dll - os=4.0 img=1.0 sys=4.0
                  "cygitcl30.dll" v0.0 ts=2000/6/10 23:34
   35k 2000/06/15 \bin\cygitk30.dll - os=4.0 img=1.0 sys=4.0
                  "cygitk30.dll" v0.0 ts=2000/6/10 23:34
  402k 2000/06/15 \bin\cygtcl80.dll - os=4.0 img=1.0 sys=4.0
                  "cygtcl80.dll" v0.0 ts=2000/6/10 23:30
    5k 2000/06/11 \bin\cygtclpip80.dll - os=4.0 img=1.0 sys=4.0
   10k 2000/06/11 \bin\cygtclreg80.dll - os=4.0 img=1.0 sys=4.0
                  "cygtclreg80.dll" v0.0 ts=2000/6/10 23:30
  639k 2000/06/15 \bin\cygtk80.dll - os=4.0 img=1.0 sys=4.0
                  "cygtk80.dll" v0.0 ts=2000/6/10 23:34
  575k 2000/06/07 \bin\cygwin1.dll - os=4.0 img=1.0 sys=4.0
                  "cygwin1.dll" v0.0 ts=2000/6/6 22:20
Use -h to see help about each section
bash.exe-2.04$ /bin/gdb -nw /bin/cat
GNU gdb 5.0
Copyright 2000 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i686-pc-cygwin"...(no debugging symbols found)...
(gdb) run
Starting program: /bin/cat.exe 
gdb: unknown target exception 0x000006d1 at 0x77e89b01

Program received signal ?, Unknown signal.
0x77e89b01 in ?? ()
(gdb) bt
#0  0x77e89b01 in ?? ()
#1  0x77d5935a in ?? ()
#2  0x77dbf327 in ?? ()
#3  0x77dbf1b1 in ?? ()
#4  0x77dbf047 in ?? ()
#5  0x77dcefa0 in ?? ()
#6  0x61031a92 in ?? ()
#7  0x6104b067 in ?? ()
#8  0x6104b1bf in ?? ()
#9  0x61002238 in ?? ()
#10 0x610027d5 in ?? ()
#11 0x4052e6 in ?? ()
#12 0x401038 in ?? ()
#13 0x77e87903 in ?? ()
(gdb) info regs
Undefined info command: "regs".  Try "help info".
(gdb) info shared
DLL Name                        Load Address
c:/bin/cygwin1.dll              61001000
d:/winnt/system32/kernel32.dll  77e81000
d:/winnt/system32/advapi32.dll  77db1000
d:/winnt/system32/rpcrt4.dll    77d41000
d:/winnt/system32/user32.dll    77e11000
d:/winnt/system32/gdi32.dll     77f41000
d:/winnt/system32/netapi32.dll  75171000
d:/winnt/system32/msvcrt.dll    78001000
d:/winnt/system32/secur32.dll   77be1000
d:/winnt/system32/netrap.dll    751c1000
d:/winnt/system32/samlib.dll    75151000
d:/winnt/system32/ws2_32.dll    75031000
d:/winnt/system32/ws2help.dll   75021000
d:/winnt/system32/wldap32.dll   77951000
d:/winnt/system32/dnsapi.dll    77981000
d:/winnt/system32/wsock32.dll   75051000
(gdb) info all-registers
eax            0x240f780	37812096
ecx            0x7ffde000	2147344384
edx            0x2417900	37845248
ebx            0x50	80
esp            0x240f778	0x240f778
ebp            0x240f7d0	0x240f7d0
esi            0x0	0
edi            0x240fa24	37812772
eip            0x77e89b01	0x77e89b01
eflags         0x246	582
cs             0x1b	27
ss             0x23	35
ds             0x23	35
es             0x23	35
fs             0x38	56
gs             0x0	0
st0            -Inf	(raw 0xe880ffffffff77f94418)
st1            0	(raw 0x025c137877fc9816025b)
st2            0	(raw 0x00000000021a0000020a)
st3            0	(raw 0x00090028025be7180000)
st4            0	(raw 0x00000000000000000000)
st5            0	(raw 0x00000000000000000000)
st6            0	(raw 0x00000000000000020024)
st7            Inf	(raw 0x7ffdec00000000000000)
fctrl          0xffff027f	-64897
fstat          0xffff0000	-65536
ftag           0xffffffff	-1
fiseg          0x0	0
fioff          0x0	0
foseg          0xffff0000	-65536
fooff          0x0	0
fop            0x0	0
(gdb) quit
bash.exe-2.04$ /bin/cat --version
cat (GNU textutils) 1.22
bash.exe-2.04$ exit
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